package com.chinamobile.ln.ictenterprises.utils;

import java.security.MessageDigest;

public class MD5Util
{

    public static String MD5(String inStr)
    {
        MessageDigest md5 = null;
        try
        {
            md5 = MessageDigest.getInstance("MD5");
        }
        catch (Exception e)
        {
            System.out.println(e.toString());
            e.printStackTrace();
            return "";
        }
        char[] charArray = inStr.toCharArray();
        byte[] byteArray = new byte[charArray.length];

        for (int i = 0; i < charArray.length; i++)
            byteArray[i] = (byte) charArray[i];

        byte[] md5Bytes = md5.digest(byteArray);

        StringBuffer hexValue = new StringBuffer();

        for (int i = 0; i < md5Bytes.length; i++)
        {
            int val = ((int) md5Bytes[i]) & 0xff;
            if (val < 16)
                hexValue.append("0");
            hexValue.append(Integer.toHexString(val));
        }

        return hexValue.toString();
    }

    public static String KL(String inStr)
    {
        // String s = new String(inStr);
        char[] a = inStr.toCharArray();
        for (int i = 0; i < a.length; i++)
        {
            a[i] = (char) (a[i] ^ 't');
        }
        String s = new String(a);
        return s;
    }

    public static String JM(String inStr)
    {
        char[] a = inStr.toCharArray();
        for (int i = 0; i < a.length; i++)
        {
            a[i] = (char) (a[i] ^ 't');
        }
        String k = new String(a);
        return k;
    }

    public static void main(String args[])
    {

        String s = new String("admin");
        System.out.println("原始s=" + s);
        System.out.println("MD5后s=" + MD5(s));
        System.out.println("MD5后加密的s=" + KL(MD5(s)));
        System.out.println("MD5后加密再解密的s=" + JM(MD5(s)));
    }

}
